📄 运算符和表达式(关系运算符).htm
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<TD width=42 vborder="0"> </TD>
<TD width=21 vborder="0"> </TD>
<TD width=39 vborder="0"> </TD>
<TD width=206 vborder="0">
<P>//最终 False || False 得
False</P></TD></TR></TBODY></TABLE>
<P>下面我们来用程序语言去有表达，如下：</P>
<P>#include <AT89X51.H></P>
<P>#include <stdio.h></P>
<P>void main(void)</P>
<P>{</P>
<P>unsigned char True = 1;
//定义</P>
<P>unsigned char False = 0;</P>
<P>SCON = 0x50; //串行口方式 1,允许接收 TMOD =
0x20; //定时器 1 定时方式 2</P>
<P>TH1 = 0xE8; //11.0592MHz 1200 波特率
TL1 = 0xE8;</P>
<P>TI = 1;</P>
<P>TR1 = 1; //启动定时器</P>
<P>if (!True || False &&
True)</P>
<P>printf("True\n"); //当结果为真时</P></DIV><BR
style="PAGE-BREAK-BEFORE: auto" clear=all>
<DIV class=Section32>
<P>else</P>
<P>}</P>
<P>printf("False\n"); //结果为假时</P>
<P>大家能使用以往学习的方法用 keil 或烧到片子上用串行口调试。能更改“!True || False</P>
<P>&&
True”这个条件式，以实验不一样算法组合来掌握逻辑运算符的使用方法。</P></DIV><BR><BR><!--推荐--></DIV></TD></TR></TBODY></TABLE></TD></TR>
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